Condenser



Ian, 6, 1925.

R. N. EHRHART CONDENSER Filed Jan. 18

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RAYMOND N. EHBZHABT, 0F EDGEWOO'D, BENNSYLVANIA, ASSIGNOR TO ELLIOTTCOMPANY, OF PITT$BURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

' CONDENSER.

Application filed January 18, 1923. Serial No. 613,367.

2 '0 all whom it may concern Be it known that I, RAYMOND N. Enn- HART, acitizen of the United States, residing at Edgewood, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in londensers, of which the following is a full, clear, andexact description.

The present invention relates broadly to heat exchange, and moreparticularly to a heat exchanging means in the form of a tubularcondenser of the surface type having a conduit leading from the vaporspace at the inlet end of the condenser to a chainber below the tubenests for maintaining Serial No. 587,196, filed September 9, 1922,

although the specific construction. of the condenser is inm'iaterial.

This invention has to do particularly with the removal ofnon-condensible gases, such as air, from the condenser. It hasheretofore been proposed to effect the removal of the air by means of aseparate air connection on eachside of the condenser. In many cases,however, it is desirable to use only one airpumping means, and wheresuch single means must withdraw from both of theair connections anelaborate and expensive fpipe layout is required to reach both sides 0the condenser. As condensers are frequently as large as twenty feet indiameter, the expense and complication involved in such an arran ementbecome apparent. Furthermore, if t e air pumping means is located at ahigh level with respect to the condenser, operating problems areencountered. It is not feasible to bring the connections underneath thecondenser and then to the pumping means, as the piping will form a trapfor the collection of water, thereby interfering with etficient airremoval. On the other hand, it is often difficult to bring air pipesover the top of the condenser to obviate this trapping action, inasmuchas the foundations of the turbine exhaust seriously interfere with suchan arrangement.

Also, it has been proposed to withdraw air through a single conduitextending downwardly through the bottom of the con denser substantiallycentrally thereof. When the air pumping means has been located at a highlevel, this construction also forms a water collecting trap interferingwith the withdrawal of the air.

By the present invention, there is provided an efficient constructionfor removing the non-condensible gases without the necessityof'employing an expensive piping layout. Also, the objection to Watertrap ping is etiectively overcome.

In the accompanying drawings, there isillustrated, more. or lessdiagrammatically, one embodiment of the present' invention, it beingunderstood that the drawings do not define the limits of the invention,and that changes may be made in the construction and operation disclosedtherein without departing from the spirit or scope of my broader claims.

In the drawings,

Figure 1 is a vertical sectional view through a condenser constructed inaccordance with the present invention; and

Figure 2 is a perspective view, partly broken away, illustrating aportion of the withdrawing means for the non-condensible gases. i

In carrying out the present invention, there may be provided a condensershell 2 of any usual or well known construction having a vapor receivingopening 3 at its upper end. Formed within the shell 2 are a plurality ofbanks or nests of tubes 4 between which the vapor passes during itstravel through the condenser.

Extending from the vapor space above the tubes 4 and adapted to conductvapor from such space to a point adjacent the terminus of flow throughthe condenser, is a. conduit 5. In the illustrated embodiment of theinvention, this conduit is formed by spacedplates 6 extendinglongitudinally of the con denser and located between the tubes. Theexact construction and location of the corn duit is, however,immaterial.

There is preferably formed adjacent the terminus of flow through thecondenserproper, a zone or chamber 7 which is separated from theinterior of the condenser proper by a perforated plate 8. The open ingsin the plate 8 are of such size and number that the condensate from thecondenser is permitted to readily pass therethrough, and thenon-condensible gases from the chamber are permitted to pass upwardlyinto the condenser without, however, permitting the passage of suficientvapor from the conduit 5 to cause the condenser to become bound.

Extending angularly outwardly and downwardly from the respective plates6, are baffles 9. These baflies are adapted to serve as guidin meansfonthe non-condensible gases within the condenser and for thenon-condensible gases liberated from the chamber 7. Thes non-condensiblegases are in turn directed through openings 10 in the plates 6 to theinterior of a chamber 11 formed in any desired manner, as by a suitablecasting, and secured in position between the plates 6. It will beapparent that any desired number of chambers 11 may be provided andspaced at suitable intervals throughout the length of the conduit 5.From these chambers the non-condensible gases pass through suitableopenings into conduits 12 extending laterally throu h the banks of tubesto one side of the con enser..

From this point on the side of the condenser the gases may beeffectively withdrawn,

through a suitable ejecting connection 13 leading to an ejector, pump orother withdrawin means. Irrespective of Whether thisW1thd1'aWing.means.;is located at a higher or lower point than thecondenser there is not provided any piping in which trapping of water maoccur.

The advantages of the invention arise from the provision of a condenserin which it is possible to withdraw the non-condensible' gases withoutthe provision of an ex ensive piping layout and without the di cultiescaused bythe trapping of water.

I claim:

1. In a condenser, a shell havin a tube nest therein, a conduit forconducting fluid to a zone below said tube nest, and means at leastpartly supported by. said conduit for conducting non-condensible gasesto a point on the side of the condenser shell.

2. In a condenser, a shell having a tube nest therein, a conduit forconducting fluid to a point adjacent the flow terminus through the tubenest, and means at least partly supported by said conduit for conductingnoncondensible gases to a point on one side of the condenser shell.

3. In a condenser, a shell having a tube nest therein, a conduit forconducting fluid to a point adjacent the How terminus of the tube nest,and means extending from said conduit to said shell for conductingnoncondensible gases to apoint on 'one side of the condenser shell.

4, In a condenser, a shell having a tube nest therein, a conduit forconducting vapor to a point adjacent the flow terminus of the tube nest,and means extending to a point on one side of the condenser shell forwithdrawing all of the non-condensible gases.

5. In a condenser, a shell having a tube nest therein, a conduit forconducting vapor to a point adjacent the flow terminus of the tube nest,and means within the shell and 'extendin to a point on one side of theshell for with rawing non-condensible gases from the condenser.

6. In a condenser, a shell havig a plurality of banks of tubes therein,a conduit for conducting va or to a point adjacent the terminus of ow.through said banks of tubes, and means extending between certain of saidbanks of tubes for conducting noncondensible gases from within thecondenser to a point on one side thereof.

7. In a condenser, a shell having a tube nest therein, a conduit forconducting vapors to a point adjacent the terminus of flow through saidtube nest, means within said conduit for receiving non-condensible gasesfrom the condenser, and means for conducting said gases from said meansto a point on one side of the condenser.

In testimony whereof I have hereunto set my hand.

RAYMOND N. EHRHART.

